A linkage multi-point lock structure of an aviation trolley

Abstract

This utility model relates to a multi-point locking structure for an aircraft trolley, comprising a side assembly, a door panel profile assembly, and a lock disc assembly. The side assembly includes a side frame with several locking hooks mounted vertically on it. The door panel profile assembly includes a door panel profile frame with a locking pin installed in a first lock hole, which can be locked together with the aforementioned locking hooks. The lock disc assembly includes a lock disc with a rotatable handle mounted at its front end. A lock head is mounted on the side of the lock disc near the door panel profile frame, and the lock head can be locked in a second lock hole. This utility model forms multiple locking points through the locking hooks of the side assembly and the corresponding locking pins of the door panel profile assembly, with the locking points evenly distributed vertically. When locked, each locking point is simultaneously stressed, dispersing the impact force on the door panel and effectively preventing loosening caused by excessive force at a single point, thus adapting to harsh environments such as aircraft turbulence.

Description

Technical Field

[0001] This utility model relates to the technical field of aviation catering carts, and in particular to a multi-point locking structure for aviation handcarts. Background Technology

[0002] Airline catering carts are devices designed to facilitate the transport of food by flight attendants. Their invention makes them convenient for people to use, as they are not only simple in structure but also easy to operate.

[0003] A search revealed Chinese Patent Publication No. CN206539133U, which discloses an aircraft sales vehicle. The vehicle door features a door lock mechanism, comprising a locking pin inserted into the side door frame, a rotating mechanism controlling the extension and retraction of the locking pin, a vertical latch, and a swinging pin mechanism. The vertical latch is fixed to the rotating mechanism, with its bottom inserted into the bottom door frame. The swinging pin mechanism is fixed to the top of the vertical latch. The swinging pin mechanism consists of a connecting handle, a rotating bracket, and a latch. The rotating bracket is fixed to the top door frame, and the middle of the connecting handle is connected to the rotating bracket via a rotating shaft. One end of the connecting handle is hinged to the vertical latch, and the other end is hinged to the latch. The top door frame has a hole for the latch to pass through. When the locking pin is inserted into the side door frame, the vertical latch is inserted into the bottom door frame, and the latch's locking hole aligns perfectly with the locking hole on the handle. The latch is then secured to the handle by passing the lock through these two locking holes, enhancing security.

[0004] Existing door lock mechanisms mainly rely on locking pins on the side door frame, vertical latches on the bottom door frame, and swing bolts on the top door frame. The number of locking points is small and concentrated on the sides, bottom, and top, failing to form a uniformly distributed multi-point locking system in the vertical direction.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a multi-point locking structure for aviation handcarts, making it more valuable for industrial applications. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a multi-point locking structure for aircraft handcarts.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A multi-point locking structure for an aircraft handcart includes a side assembly, a door panel profile assembly, and a lock disc assembly;

[0009] The vehicle side assembly includes a vehicle side frame, on which several locking hooks are mounted vertically;

[0010] The door panel profile assembly includes a door panel profile frame, and a number of first lock holes are provided vertically on the side of the door panel profile frame near the vehicle side frame. Locking pins that can be locked together with the aforementioned lock hooks are installed in the first lock holes.

[0011] The lock plate assembly includes a lock plate with a rotatable handle installed at the front end of the lock plate. The first end of the handle is connected to a diaphragm plate located at the rear end of the lock plate. A lock head is installed on the diaphragm plate on the side near the door panel profile frame. A second lock hole is opened on the side of the door panel profile frame near the lock plate, and the lock head can be locked in the second lock hole.

[0012] As a further improvement of this utility model, the lock hook component includes a lock hook fixing end installed on the side frame of the vehicle, and at least one lock hook slot is provided on the outer side of the lock hook fixing end; the lock pin component includes a lock pin fixing end installed on the door panel profile frame in the first lock hole, and a lock pin block is provided on the lock pin fixing end that is locked together with the aforementioned lock hook slot.

[0013] As a further improvement of this utility model, an inner insert is installed inside the door panel profile frame, and several locking pin mounting grooves for installing the locking pin fixing end are opened on the inner insert along the vertical direction.

[0014] As a further improvement of this utility model, corner connectors are installed at the top and bottom of the door panel profile frame.

[0015] As a further improvement of this utility model, a recessed cavity is provided at the front end of the lock disc, and a latch frame is installed in the cavity near the center. The latch plate at the second end of the handle can be installed on the latch frame.

[0016] As a further improvement of this utility model, a handle is installed on the top side of the cavity.

[0017] As a further improvement of this utility model, an arc-shaped guide rail is provided in the recessed cavity on one side of the latch frame.

[0018] As a further improvement of this utility model, a cover plate is installed on the outside of the lock head.

[0019] By means of the above solution, this utility model has at least the following advantages:

[0020] This invention utilizes a number of locking hooks on the vehicle side assembly and corresponding locking pins on the door panel profile assembly to form multiple locking points, which are evenly distributed vertically. When locked, each locking point is simultaneously subjected to force, dispersing the impact force on the door panel and effectively preventing loosening caused by excessive force at a single point, thus adapting to harsh environments such as aircraft turbulence.

[0021] This invention achieves dual locking through the mechanical locking of the locking pin and the locking hook (main locking) and the locking of the lock head and the second lock hole (auxiliary locking), without relying on external locks.

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the following are the preferred embodiments of this utility model and are described in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a structural diagram of a multi-point locking structure for an aviation handcart according to this utility model;

[0025] Figure 2 yes Figure 1 A structural diagram of the other side;

[0026] Figure 3 yes Figure 1 Schematic diagram of the CRRC side component;

[0027] Figure 4 yes Figure 3 Schematic diagram of the center lock hook component;

[0028] Figure 5 yes Figure 1 Structural diagram of the middle door panel profile assembly;

[0029] Figure 6 yes Figure 5 Schematic diagram of the internal fittings inside the middle door panel profile frame;

[0030] Figure 7 yes Figure 6 Schematic diagram of the central locking pin;

[0031] Figure 8 yes Figure 1 Schematic diagram of the central locking disc assembly;

[0032] Figure 9 yes Figure 8 A schematic diagram of the structure on the other side.

[0033] The meanings of the labels in the figures are as follows.

[0034] 1. Side panel assembly; 2. Door panel profile assembly; 3. Lock disc assembly; 4. Side frame; 5. Lock hook assembly; 6. Lock hook fixing end; 7. Lock hook slot; 8. Door panel profile frame; 9. Corner connector; 10. First lock hole; 11. Second lock hole; 12. Inset piece; 13. Lock pin mounting groove; 14. Lock pin fixing end; 15. Lock pin block; 16. Lock disc; 17. Cavity; 18. Handle; 19. Lock head; 20. Handle; 21. Guide rail; 22. Lock latch frame; 23. Lock latch plate; 24. Diaphragm plate; 25. Cover plate; 26. Detailed Implementation

[0035] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] The first embodiment of this utility model:

[0038] like Figures 1-9 As shown in the figure, the multi-point lock structure of the aviation handcart in this embodiment mainly includes a side component 1, a door panel profile component 2, and a lock disc component 3.

[0039] The side panel assembly 1 includes a side panel frame 4, on which several locking hooks 5 are mounted vertically. The door panel profile assembly 2 includes a door panel profile frame 8, on which corner connectors 9 are mounted at the top and bottom. Several first locking holes 10 are vertically formed on the side of the door panel profile frame 8 near the side panel frame 4, and locking pins 14 that can be locked together with the aforementioned locking hooks 5 are installed in the first locking holes 10. The lock disc assembly 3 includes a lock disc 17, on which a rotatable handle 19 is mounted at the front end. The first end of the handle 19 is connected to a diaphragm disc 25 located at the rear end of the lock disc 17. A lock head 20 is mounted on the side of the diaphragm disc 25 near the door panel profile frame 8. A second locking hole 11 is formed on the side of the door panel profile frame 8 near the lock disc 17, and the lock head 20 can be locked in the second locking hole 11. A cover plate 26 is mounted on the outside of the lock head 20.

[0040] The locking hook component 5 includes a locking hook fixing end 6 installed on the side frame 4, and at least one locking hook groove 7 is provided on the outside of the locking hook fixing end 6; the locking pin component 14 includes a locking pin fixing end 15 installed on the door panel profile frame 8 in the first lock hole 10, and a locking pin block 16 is provided on the locking pin fixing end 15 that is locked together with the aforementioned locking hook groove 7.

[0041] An inner insert 12 is installed inside the door panel profile frame 8. Several locking pin mounting slots 13 are provided on the inner insert 12 along the vertical direction for installing the locking pin fixing end 15.

[0042] A recessed cavity 18 is provided at the front end of the lock disc 17. A latch frame 23 is installed in the cavity 18 near the center. The latch plate 24 at the second end of the handle 19 can be installed on the latch frame 23. An arc-shaped guide rail 22 is provided in the recessed cavity 18 on one side of the latch frame 23. A handle 21 is installed on the top side of the cavity 18.

[0043] In this embodiment, multiple locking points (such as 3-5, depending on the height of the trolley) are formed by several locking hooks 5 (arranged vertically) on the vehicle side assembly and corresponding locking pins 14 on the door panel profile assembly. The locking points are evenly distributed vertically. When locked, each locking point is subjected to force synchronously, dispersing the impact force on the door panel, effectively avoiding loosening caused by excessive force on a single point, and adapting to harsh environments such as aircraft turbulence.

[0044] The second embodiment of this utility model:

[0045] This embodiment discloses a multi-point locking structure for aircraft handcarts, used to reliably lock the handcart door panel to the side of the cart, adapting to the turbulent environment of air transport. The structure mainly consists of three parts: a side panel assembly 1, a door panel profile assembly 2, and a lock disc assembly 3. The specific construction of each component is as follows:

[0046] 1. Side component 1:

[0047] Side assembly 1 is a fixed side frame structure for the handcart, used to lock in conjunction with door panel profile assembly 2. Its core components include:

[0048] Side frame 4: Made of welded aluminum alloy square tubing, serving as the main support structure for the side components, extending along the height of the handcart (the height is consistent with the handcart body).

[0049] Locking hooks 5: 3-5 hooks (3 in this embodiment) are evenly distributed along the vertical direction of the side frame 4, with a certain spacing between adjacent hooks. Each locking hook 5 includes a locking hook fixing end 6 and a locking hook slot 7: the locking hook fixing end 6 is a steel plate (3mm thick) and is fixed to the inner wall of the side frame 4 by 4 M5 screws; the locking hook slot 7 is a U-shaped groove (10mm deep and 8mm wide) integrally stamped on the outer side of the locking hook fixing end 6, with the slot facing the door panel profile assembly 2, for locking with the locking pin block 16 of the locking pin 14.

[0050] 2. Door panel profile assembly 2:

[0051] Door panel profile assembly 2 is a movable door panel structure for a handcart, which can rotate around the hinge to open and close. Its core components include:

[0052] Door panel frame 8: High-strength aluminum alloy profile (hollow rectangular cross-section) is used as the main frame of the door panel. The edges are fitted to the vehicle body with sealing strips to enhance the sealing performance.

[0053] Corner connector 9: One is installed at the top and one at the bottom of the door panel profile frame 8. It is an L-shaped aluminum alloy casting (5mm thick) and is fixed to the corner of the door panel profile frame 8 by bolts. It is used to strengthen the corner strength of the door panel and prevent deformation after long-term use.

[0054] First lock hole 10: On the side of the door panel profile frame 8 near the vehicle side frame 4, four first lock holes 10 are provided in the vertical direction corresponding to the position of the lock hook 5, for installing the lock pin 14.

[0055] Inset 12: Its length is nearly the same as the height of the door panel profile frame 8. It is installed in the internal cavity of the door panel profile frame 8. Its surface has 4 locking pin mounting grooves 13 in the vertical direction. The grooves are provided with anti-slip teeth for accurately fixing the position of the locking pin 14.

[0056] Locking pin 14: Installed in the first locking hole 10, it is interference-fitted with the locking pin mounting groove 13 of the inner insert 12 (interference amount 0.1-0.2mm). Each locking pin 14 includes a locking pin fixing end 15 and a locking pin locking block 16: the tail of the locking pin fixing end 15 is fixed to the inner insert 12; the locking pin locking block 16 is a rectangular protrusion integrally formed on the head of the locking pin fixing end 15 (the size matches the locking hook groove 7). In addition, the locking pin locking block 16 can also be designed to extend and retract with the locking pin fixing end 15 to achieve locking / unlocking with the locking hook groove 7.

[0057] Second lock hole 11: It is opened in the middle of the side of the door panel profile frame 8 near the lock disc assembly 3, and is used to cooperate with the lock head 20 to achieve auxiliary locking.

[0058] 3. Locking disk assembly 3:

[0059] Locking disc assembly 3 is the core of the operation, used to drive the coordinated actions of various locking components. Its core components include:

[0060] Lock disc 17: Fixedly installed on the outer middle part of the door panel profile 8, serving as the mounting base for the lock disc assembly.

[0061] Cavity 18: Opened in the middle of the front end face of the lock disc 17 to accommodate the operating components.

[0062] Handle 19: It is a rotatable metal part. Its first end is connected to the cavity 18 near the bottom via a pivot, and its second end extends out of the cavity for easy gripping and operation.

[0063] Diaphragm plate 25: Installed at the rear end of the locking plate 17, it is rigidly connected to the first end of the handle 19 via an eccentric shaft (eccentricity 8mm). When the handle is rotated, it can drive the diaphragm plate to rotate synchronously.

[0064] Lock head 20: a metal part, installed on the middle of the side of the diaphragm plate 25 near the door panel profile frame 8, coaxial with the diaphragm plate 25, used to lock with the second lock hole 11.

[0065] Latch 23: It is fixed in the cavity 18 near the center by screws and is used to limit the rotation angle of the handle 19.

[0066] The latch plate 24 is a 1.5mm thick steel plate, fixed to the inner side of the second end of the handle 19. It can be inserted into the slot of the latch frame 23 as the handle rotates, so as to lock and position the handle (rotation angle is limited).

[0067] Guide rail 22: Fixed on the inner wall of the cavity 18 on one side of the latch frame 23, it slides with the edge of the latch plate 24 to provide guidance for the rotation of the handle and ensure smooth operation.

[0068] Handle 21: A grip made of rubber, fixedly installed on the top side of the cavity 18, with anti-slip texture on the surface, making it easy to hold and operate stably in bumpy environments.

[0069] A brief description of the working process of this embodiment:

[0070] 1. Locking process:

[0071] When it is necessary to close and lock the trolley door, the operating steps are as follows:

[0072] Close the door panel: Push the door panel profile assembly 2 to rotate around the hinge, so that the door panel profile frame 8 fits against the side frame 4. At this time, the lock hook 5 is aligned with the first lock hole 10.

[0073] Rotate the handle: Hold the handle 21 to stabilize your hand, and rotate the handle 19 from the initial unlock position (0°, handle horizontally outward) towards the inside of the cavity 18. During the rotation of the handle, the latch plate 24 slides along the guide rail 22 to ensure a stable rotation trajectory without jamming.

[0074] Linkage drive locking pins: The rotation of handle 19 drives the diaphragm disc 25 at the rear end to rotate synchronously (eccentric shaft rotation). The diaphragm disc drives all locking pins 14 to extend towards the side frame 4 synchronously through the linkage structure (built into the door panel profile frame 8). The locking pin fixed end 15 slides along the locking pin mounting groove 13 of the inner insert 12, and the locking pin block 16 gradually inserts into the corresponding locking hook groove 7 of the locking hook 5 to achieve multi-point locking (3 locking points lock synchronously).

[0075] Locking the lock head: As the handle is rotated to the 90° locking position, the diaphragm 25 drives the lock head 20 to move synchronously toward the second lock hole 11, and the lock head is inserted into the second lock hole 11.

[0076] Handle positioning: When the handle is rotated to 90°, the latch plate 24 engages in the slot of the latch frame 23, and the handle can no longer be rotated, completing the entire locking process. At this time, the door panel profile assembly 2 and the vehicle side assembly 1 achieve multiple reliable locking through the cooperation of 3 locking pin blocks and locking hook slots, and the cooperation of 1 lock head and second lock hole.

[0077] 2. Unlocking process

[0078] When you need to open the trolley door, the steps are as follows:

[0079] Release the handle positioning: Hold the handle 21 and pull the second end of the handle 19 outward to disengage the latch plate 24 from the slot of the latch frame 23 and release the handle positioning restriction.

[0080] Reverse rotation of the handle: Rotate the handle 19 in the reverse direction from the 90° locked position to the initial 0° position. During the rotation of the handle, the latch plate 24 slides in the reverse direction along the guide rail 22.

[0081] Linkage unlocking of locking pins: The reverse rotation of the handle causes the diaphragm plate 25 to rotate in the reverse direction. The diaphragm plate pulls all locking pins 14 toward the inside of the door panel profile frame 8 through the linkage structure. The locking pin block 16 exits from the locking hook groove 7 and disengages from the locking state.

[0082] Lock unlocking: The diaphragm rotates in the opposite direction, causing the lock head 20 to exit from the second lock hole 11.

[0083] Open the door panel: When the handle is turned to the 0° initial position, all locking pins and lock heads are fully reset, and the locking relationship between the door panel and the side frame is released. At this time, the door panel can be pulled to rotate around the hinge to open the trolley door panel.

[0084] Through the above-mentioned linkage structure design, this embodiment realizes multi-point uniform locking and synchronous unlocking of the trolley door panel. The locking is reliable and the operation is convenient. It can effectively adapt to the turbulent environment in air transport and avoid the risk of cargo falling off accidentally.

[0085] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0086] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0087] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-point locking structure for an aircraft handcart, comprising a side assembly (1), a door panel profile assembly (2), and a lock disc assembly (3). Its features are: The vehicle side assembly (1) includes a vehicle side frame (4), on which a plurality of locking hooks (5) are installed in the vertical direction. The door panel profile assembly (2) includes a door panel profile frame (8). Several first lock holes (10) are provided on the side of the door panel profile frame (8) near the vehicle side frame (4) in a vertical direction. A locking pin (14) is installed in the first lock hole (10) and can be locked together with the above-mentioned lock hook (5). The lock disc assembly (3) includes a lock disc (17), a rotatable handle (19) is installed at the front end of the lock disc (17), the first end of the handle (19) is connected to a diaphragm disc (25) located at the rear end of the lock disc (17), a lock head (20) is installed on the diaphragm disc (25) near the door panel profile frame (8), and a second lock hole (11) is opened on the door panel profile frame (8) near the lock disc (17), and the lock head (20) can be locked in the second lock hole (11).

2. The multi-point locking structure for an aircraft handcart as described in claim 1, characterized in that, The locking hook component (5) includes a locking hook fixing end (6) installed on the side frame (4), and at least one locking hook slot (7) is provided on the outside of the locking hook fixing end (6); the locking pin component (14) includes a locking pin fixing end (15) installed on the door panel profile frame (8) in the first lock hole (10), and a locking pin block (16) is provided on the locking pin fixing end (15) that is locked together with the locking hook slot (7) mentioned above.

3. The multi-point locking structure for an aircraft handcart as described in claim 2, characterized in that, An inner insert (12) is installed inside the door panel profile frame (8), and several locking pin mounting slots (13) for installing the locking pin fixing end (15) are opened on the inner insert (12) along the vertical direction.

4. The multi-point locking structure for an aircraft handcart as described in claim 1, characterized in that, Corner connectors (9) are installed at the top and bottom of the door panel profile frame (8).

5. The multi-point locking structure for an aircraft handcart as described in claim 1, characterized in that, A recess (18) is provided at the front end of the lock disc (17), and a latch frame (23) is installed in the recess (18) near the center. The latch plate (24) at the second end of the handle (19) can be installed on the latch frame (23).

6. The multi-point locking structure for an aircraft handcart as described in claim 5, characterized in that, A handle (21) is installed on the top side inside the cavity (18).

7. The multi-point locking structure for an aircraft handcart as described in claim 5, characterized in that, An arc-shaped guide rail (22) is provided in the cavity (18) on one side of the latch frame (23).

8. The multi-point locking structure for an aircraft handcart as described in claim 1, characterized in that, A cover plate (26) is installed on the outside of the lock head (20).

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